On Wed, Mar 9, 2016 at 5:30 PM, George Dunlap <george.dun...@citrix.com> wrote:
> On 08/03/16 15:30, Malcolm Crossley wrote: > > Nested hap code assumed implict bitmask semantics of the p2m_access_t > > enum prior to C/S 4c63692d7c38c5ac414fe97f8ef37b66e05abe5c > > > > The change to the enum ordering broke this assumption and caused > functional > > problems for the nested hap code. As it may be error prone to audit and > find > > all other p2m_access users assuming bitmask semantics, instead restore > the > > previous enum order and make it explict that bitmask semantics are to be > > preserved for the read, write and execute access types. > > > > Signed-off-by: Malcolm Crossley <malcolm.cross...@citrix.com> > > Looks good; but following up Jan's point, could you do a brief survey of > the places where the p2m_access values are used, and confirm that none > of them now implicitly assume that p2m_access_rwx is zero? > > (Or Tamas, can you say that you're reasonably certain nothing has now > come to depend on the value of p2m_access_rwx being zero?) > Yes, from my perspective it's all fine as checks of p2m_access values are done with the enum names and not the values directly. Tamas
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